const socres =[90,91,92,93,94]
let tovtal =0

for(let i =0; i<socres.length;i++){

    tovtal = tovtal+socres[i]
}
const averavg =tovtal / socres.length
console.log(averavg)

let shopping = ["bread","milk","cheess"]
let ramdom =["bread", "milk",18,16]
console.log('shopping',shopping)
console.log('ramdom',ramdom)

console.log(shopping.join("-"))
console.log(shopping.indexOf("milk"))
console.log(shopping.concat("milk","bread"))
console.log()
shopping.push("apple")